It's mostly because I was just trying to futz with the getting started app. Start with something that's working and see if you can slowly change it to something you want to do.

Beyond that, at some point the app will go out and grab new data from a web service, which is why I was using jsonp.

As to nested list, again it was just because that's what the getting started app was using and I had that working. I would like to use a detail pane when I get farther down the road, but I'm guessing I can do that with a regular list too ...